Heating boiler



Nov. 3, 1931. G. F. BIERBowER HEATING BOILER Filed June 5, 1929 ff 19 jme j?. 695m@ rZZerawef z ...llEl

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Patented Nov. 3, 1931 y GESNER r. BIERBowEn, or

CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF BEST, OF CHICAGO, ILLINOISPATENT OFFICE TO LAFE T.

HEATING BOILER Application led June 5, 1929. Serial No. 368,688.`

This invention -relates to improvements in heating boilers and hasspecial reference to boilers usually used for heating plants fordwellings which use hot water as the heat transmitting medium.

The object of the invention is to provide a boiler for the purpose, ofmaximum heat transmission capacity and of minimum size or dimensions andhence of relatively low cost.

A further object is to provide a boiler for the purpose mentioned whichshall have a relatively small water capacity and a relatively large areafor transmission of heat to the water.

A further object is to provide a boiler of simple construction andespecially adapted for being made of plates joined by weldingk insteadof riveting.

My invention resides in a boilerv for the purpose mentioned, which isprovided with a plurality of gas lines larger at their inlet than attheir exit ends and tapered filler tubes spaced between the flues andhaving their larger ends adjacent to the smaller ends of the flues.

Another feature lrelates to the outer walls of the boiler, being taperedor inclined simiv larly to the tapering of the flues, which results inthe minimizing of the water space. A

Another feature relates to the preferred form of tubes which are squarein cross-section, the boiler being also preferably square incross-section, thus providing a form which l50 pecially adapted forusing gas as a fuel.

of substantially uniform thickness The boiler consists of the boilerproper 2l i e is provided with a gas escape nozzle 7 which projects intoaV coned nozzle V8 attached to a chimney pipe 9. Between the end of thenoz-l zle 7 and the coned nozzle 8 is an air inlet opening 10for'preventing back drafts reaching the gas burner.

The present invention relatesparticularly to the boiler proper2. This,as shown, is substantially square in horizontal section and is taperedvertically, being smaller at the topf 11 than at its lower end 12.Leading Afrom thebottom 12 of the boiler to ythe top 11. are tapered`gas tubes or lines 13. In theform shown, these fines are squarelinhorizontal section, and their large ends 14 are at the bottom andtheir smallends 15 are at the top.

The Y products of combustion` rise through these flues, givingoff theirheat to the water 16 which surrounds the ues. As the gases rise throughthe flues and give o their heat, they reduce in volume, 'and the tubes13 are tapered substantially in proportion toy this shrinkage in :volumeof the gases.

As shown yin the drawings,v the 4outside walls l17 of the boiler areinclined substantially'parallel with the adjacent sides'of the fines.This is for the purpose of reducing the water space in the boiler andassists in the rapid heating of the contained water. As a further meansof reducing the volume of the contained water, hollow filler members 18are provided which are tapered or- 'coned similarly'to the tubes 13 butare'open at their large ,ends419 only. These fillers lare arranged inthe spaces betweenthe ues 13 and depend from the top end 11 oftheboiler. They are also preferably square in horizontal cross-section andVserve to reduce the water space inthe boiler to relatively thin spacesbetween the tubes and fillers.

'In' making"v up the boiler 2, sheets lof sheet metal arev cut to properdimensions and shapes to form the sides, top and bottom,l and theseplates Vare preferably joined by Vcntion to the specific details ofconstruction and combination of parts'herein 'shown andH described.

' l. A boiler" of' the kind desc''rib`ed,Y coinprisin'g a shellV andheads,4v a plurality of ta'- peredjgas tubes connecting the headsand gastubes connecting the heads'and providing' tapered gas lues through theboiler, 0pp0- ,sitely tapered hollow iller members arranged between thegas tubes and having their larger ends adjacent to the smaller ends ofthe gas tubes, the she11 ef-t'hebiler; ,the tubes and mennen havingnamens-weien@ in parallelplanes.

dey' ofMa'yg 1929. i i GESNER F. BIERBOWER.

providing tapered gas' i'u'esthroughfthe boiler, and oppositely taperedhollow liller trienibersV arrangedl between the gas` tubesA and havingltheir larger ends adja'c'entk to the` smaller ends ofthe gastubes.L K

2. A boiler ot the kind defsciibed5y coniprisiiig a' shell and'liead's",a: plurality f tapered gasltub's connecting` the heads andpfovuingitapeed gas fines uifugnth'bpil: er, oppositely tapered hollowAfiller members arranged between the gastube's'and having their largerends adj aeent" to tliesmall'er'ends of thega's `tubesgand thes'hell 'ofthe boiler beingl tapered similarly to the gas'tubes. v

3. A boiler of the kind described; coi'nprisl` iiig a shell and heads,'aplurality of'tapered' gas tubes connecting the heads and provid' ingtapered gas'liiesjthr'cnigli the boiler, oppositely tapered hollow`iiller members' 'arl' ranged between .the gas tubes and haig theirlarger ends adj acent't the smaller eiids of the gasztubes. and theshell ofthe Boiler,

tl'iegas tubes andr'the llei'sbeiiig all tapered on substantially the'sainel angle 4. A boilerl'ottlekind described, cmprisf ing ajshell andheads,a pliiralityoftapered g'as tribes connecting the heads:aidjjroif'iding tapered gas liies throdgh the" boiler, op-4 positelytapered holloyvr filler members r# ranged between the gas tubesand'zhving their largerends adjacent toA the'smaller ends of the' gas`tubes; the; shell'of theboil'enthe gas tubes andy theJ llers` all beingpolygonal in cross-section; i

j 5. Aboiler of the kind descibedgcmpris' ing a shell and heads', aplurality of tapered gas tubes connecting' the heads and providingtapered gasues through the"bile, oppo sitely tapered -holloyi7 fillerviii'ember'slarianged between the gas tutes and havingrheirige. ends'adjacent to the smaller ends df the gas tubes,th e shell 0f theboilgrtlie" gasftubs and thev iille'rs all being' square inyc'rsslsection.

I e.. About): of wenn@isnbedgoipns ing a geen :redheads a pine-tiny o'ftapered dit alii

